807b90d0be
* Use the same bit for IDE_HFLAG_CS5520 and IDE_HFLAG_VDMA host flags (both are used only by cs5520 host driver currently). * Add IDE_HFLAG_NO_IO32_BIT host flag and use it instead of ->no_io_32bit ide_hwif_t field. * Add IDE_HFLAG_NO_UNMASK_IRQS host flag, then convert dtc2278 and rz1000 host drivers to use it. There should be no functionality changes caused by this patch. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/*
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* Copyright (C) 1995-1998 Linus Torvalds & author (see below)
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*/
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/*
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* Principal Author: mlord@pobox.com (Mark Lord)
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*
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* See linux/MAINTAINERS for address of current maintainer.
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*
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* This file provides support for disabling the buggy read-ahead
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* mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
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*
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* Dunno if this fixes both ports, or only the primary port (?).
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/hdreg.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
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{
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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u16 reg;
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if (!pci_read_config_word (dev, 0x40, ®) &&
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!pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
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printk(KERN_INFO "%s: disabled chipset read-ahead "
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"(buggy RZ1000/RZ1001)\n", hwif->name);
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} else {
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if (hwif->mate)
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hwif->mate->serialized = hwif->serialized = 1;
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hwif->host_flags |= IDE_HFLAG_NO_UNMASK_IRQS;
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printk(KERN_INFO "%s: serialized, disabled unmasking "
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"(buggy RZ1000/RZ1001)\n", hwif->name);
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}
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}
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static const struct ide_port_info rz1000_chipset __devinitdata = {
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.name = "RZ100x",
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.init_hwif = init_hwif_rz1000,
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.chipset = ide_rz1000,
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.host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_BOOTABLE,
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};
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static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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return ide_setup_pci_device(dev, &rz1000_chipset);
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}
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static const struct pci_device_id rz1000_pci_tbl[] = {
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{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
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{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
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static struct pci_driver driver = {
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.name = "RZ1000_IDE",
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.id_table = rz1000_pci_tbl,
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.probe = rz1000_init_one,
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};
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static int __init rz1000_ide_init(void)
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{
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return ide_pci_register_driver(&driver);
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}
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module_init(rz1000_ide_init);
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MODULE_AUTHOR("Andre Hedrick");
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MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
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MODULE_LICENSE("GPL");
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